ADH1, an N-cadherin inhibitor, evaluated in preclinical models of angiogenesis and androgen-independent prostate cancer

The conversion from E-cadherin to N-Cadherin has been observed in several human Cancer types, including prostate Cancer, with more homogenous expression of N-Cadherin detected in high-grade prostate tumors. N-Cadherin, in vitro, has been shown to promote cell mobility, migration and invasion of several Cancer cell lines, indicating the possibility of N-Cadherin as a molecular target of Cancer therapy. Herein, we examined the potential of an N-Cadherin inhibitor, ADH1, in reducing tumor angiogenesis ex vivo and delaying tumor progression in vivo. Our data demonstrate that ADH1, at the dosages evaluated, does not display either antiangiogenic activity in a rat aortic ring assay or antitumor potential in a PC3 subcutaneous xenograft tumor model. We detected cytotoxic activity in human umbilical vein endothelial cells, PC3, and Tsu-Pr1 cells, when ADH1 exposure was evaluated at 500 micromol/l or above.